Effect of irrigation on soil moisture

Dynamic changes in soil moisture

Irrigation directly affects the dynamic changes in soil moisture. Different irrigation methods will lead to different sizes and water distribution of soil wet bodies. For example, different irrigation methods such as sub-film drip irrigation, underground drip irrigation and micro-wetting irrigation will have a significant impact on the size and water distribution of soil wet bodies. Studies have shown that sub-film drip irrigation and underground drip irrigation can form larger soil wet bodies, while micro-wetting irrigation can make the water distribution of soil wet bodies more uniform.


Improvement of soil permeability

Water-saving irrigation improves soil drainage performance by reducing soil overwetting and increasing soil porosity and permeability. Reducing soil moisture content and reducing soil pores blocked by water increases the number of large pores and improves soil permeability. In addition, water-saving irrigation can also improve soil structure, reduce soil compaction, facilitate root penetration into the soil, and promote crop growth and development.


Soil salt accumulation control

Irrigation also has an important impact on soil salt accumulation. Water-saving irrigation reduces the amount of irrigation water, reduces water evaporation in the soil and salt migration, thereby inhibiting soil salt accumulation. Reduce the flow of water in the soil, inhibit the migration and accumulation of soluble salts, and reduce the salt content of the soil. At the same time, improve the soil structure, enhance the aeration and drainage of the soil, which is conducive to salt leaching and reduces soil salinization.

Soil water use efficiency

Different irrigation methods have different water use efficiency for crops. For example, under micro-irrigation conditions, although the irrigation quota was greatly reduced, its yield was only reduced by 15.7%~17.7%, showing a large water-saving potential. This shows that a reasonable irrigation method can not only effectively utilize water resources, but also ensure the normal growth of crops.


Conclusion

In summary, the impact of irrigation on soil moisture is multifaceted, including dynamic changes in soil moisture, improvement of permeability, control of salt accumulation, and water use efficiency. Choosing appropriate irrigation methods and irrigation technologies is of great significance for maintaining soil health, increasing crop yields, and achieving sustainable use of water resources.

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